Edmund f



(No Model.) f l E. I'. KITTOE.

` VBNTILATOR.' No. 395,282. Patented Deo. Z5, 1888.

1);" Ll" n" EDMUND F. IIITTOE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE IIOLBROOK d KANE COMPANY, OF SAME PLACE.

VENTI LATOR.

SPECIFICATION forming part of Letters Patent No. 395,282, dated December 25, 1888. Application filed December 81, 1887l Serial No. 259,466. (No model.)

To all whom t may concern,.-

Be it known that I, EDMUND F. KITTOE, of the city of Chicago and State of Illinois, have invented a new and useful Improvement in 5 Ventilators, of which the following is a speciiication, reference being had to the accompanying drawings, in which- Figure l is a front elevation, with a portion broken away to show the interior. Fig. 2 is 1o a vertical section on the line l l, Fig. l, and Fig. 3 a horizontal section on the line 2 2, Fig. l.

My invention is simply an improvement in ventilators, in which a gas-jet, A, is inserted in a flue or chamber, B, closed at the bottom and opening at the top into flue or chimney C. In the construction to which my improvement is applied the supply-current enters the chamber C through a contracted orizo tice, D, directly into and against the gas jet or flame A, creating a blow-pipe action, heating the walls of the chamber B, and thus notably increasing the upward draft into the flue C, and the quantity of air removed from an apartment by the ventilator. In the preferable form of such construction the supply-current of air is, in addition, heated also by causing' it to pass through the siphon E, adjacent to the chamber B, before it enters 3o the orifice D.

As the cha-mber B is closed at the bottom, in order to insure torce to the supply-current entering through the oriiice D against the gritsflame A, and as the orilice D is somewhat 3 5 contracted to secure the most effective blast against the gastlame A, the amount of.' air carried off through the ventilator is limited to what can pass through a narrow orifice, although by the blow-pipe action of the blast 4o of air against the llame A an amount of heat is developed sufficient to move a much greater quantity of air. This additional air cannot be admitted to the chamber B by making an additional opening at its base, for this would destroy to a greater or less degree the blast through the orilicc D against the flame A, and thus materially reduce the heat, which is the motive power in the apparatus. To overlcome this difficulty I have devised a simple 5o but what proves to be a very eifective device,

which, introduced into the apparatus above described, greatly increases its efficiency and the quantity of air removed through it in a given time. A tube or tubes, F F, are inserted in the chamber B, forming passages open below, at f, to the outer air and above, at f, within the chamber B, preferably at or near the place of its contraction in entering the flue. The passages F may be arranged in a variety of forms; but in the form illustrated 6o in the drawings they are arranged adjacent to the gas-flame A, so that in operation they become heated and a powerful suction is produced therein, carrying large quantities ot' air up into the flue C, and withoutproducing any dimin ution in the blast of air entering through the oriiice D against the flameA, and producing the heat or motive power. On the contrary, I iind that the current of air passing upward through the passages F has an injector-like 7o action upon the air in the chamber B, tending to even increase the blast through the orifice D and the heat thus made available in the movement of a column of air into the :flue C.

The result, as shown in actual practice, is y 5 th at the working capacity of the apparatus is greatly increased by the introduction of my improvement, as above set forth.

Having thus described Vmy invention, what I claim as new, and desire to secure by Letters 8o Patent, is

l. The combination, with a ventilator consisting of a flue or chamber closed atits lower end and openin above into a flue or chimney, and provided with a contracted orifice which 8 5 directs the incoming air into or against an inclosed gas jet or flame, of one or more :fines or passages opening outward to the open air and inward within the chamber above the flame, whereby an increased quantity of air 9o is carried into the upper flue or chimney without impairing the blast of air through the contracted orifice into the ilame, substantially as set forth.

2. The combination, with a ventilator consisting of a flue or chamber closed at its lower end and opening' above into a VIl ue or chimney, and provided with a contracted orifice which directs the incoming air into or against an inclosed gas jet or flame, of one or more llues 10o or passages opening outward to the open air alne, A, orifice D, and tubes or passages F, and inward within the Chamber above the adjacent to the 'lame, and Siphon E, substan- 1o flame and passing,` adj aeent to the flame withtially as and for the purpose set forth.

out Communication therewith, whereby they f n 5 become heated, accelerating the passage of EDMUND F' kITlOE' air through them, substantially as set forth. Witnesses:

3. In a ventilator, the Combination of the T. S. E. DIXON, iue or Chamber B, provided with a gas jet or L. HILL. 

